Dynamo-electric machine.



new and useful Improvements in Dyn PATENT OFFICE.

HENRY G. REIST, OF SCHENEOTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRICCOMPANY, A CORPORATION OF NEW YORK.

oYNAmo-Euic'rmo MACHINE Specification of Letters Patent.

Patented Feb. 6, 1906.

Application and in; 7,1904. sum Kc. seesaw.

zen of the United States, residing at chen ectsdy, in the county ofSchenectady and State of New York, have invented certain amo' Electriclrlechines of which the following is a and or specification.

My present invention relates to a dynamo electric machine; and itconsists in certain features of construction and arrangement, some ofwhich are particularl useful with alternators of comparatively argesize,While others are not limited to any particular type or size of machine.

The various features of novelty which characterize my invention arepointed out.

with articularity in the claims annexed to a part of this specification.For a better un erstanding of my invention, how

ever reference maybe had to the accom any-- ing drawings anddescription,in which have illustratedone embodiment of my invention.

Of the drawings; Figure 1 is an'elevation with partsbrokenaway,-showing' a portion of Fig. 2 is asection on the line 2 20f 1. Fig.3 is a diagrammaticsl section showing the relative arrangement, of thetenon on a punching and the slot into which it enters before the tenonis inserted. Fig. 4 is a similar view showing a number oi tenons inlace, and Fi 5 in section on n lineo f ig.4." Referring to the drawing,1 represents a ring of m netic material w noted, as s own; and whichissup iorted by the spider-arms 2 of the revolving e ement of a largealternator. The ring 1 carries on its outer side in number of polarportions 3.-

-The"stationary external armature-1, eohp each being are-slgefed andformed with two crating with the revoluble field member, oomtions 5,separated by ventilating-spaces of laminae 6, which are dovetailed intoan annular supporting member 7, which may be formed in sections, ifdesired. The laminae 6 are clamped between end clamping members 8,secured together by bolts 9. It will be understood that the end clsmpingmembers 8 ma he formed in sections if esired.

Slots are ormed in the laminated armaturecore adjacentits inner;peripheryin the usual manner to .I'BOGIVB armature-conductors 10,

the ends of whieh extend ontyvard from the rejecting ch may be lamiicore substantially erallel to the axis of revolution of the eve ublemember.

Annular ra ially-extending members 11,

which may be formed in sections, if desired, are removsbly secured tothe member 7 by bolts 13. The members 11, with the member 7, serve toinclose the revolving polar projeclawns and the armature-core andwindings.

and to give rigidity to the armature constrnction. A number of brackets14 are secured to the inner side of the member 11 in any suitablemanner. The inner ends of the brackets 14 carry a ring or member 15,which is concentric with the axis of the machine, thering being securedto the brackets in any suitable manner. The projecting ends of thearmature conductors 10 rest against the outer periphe of the ring ormember 15.

An adjustab e annular member 16, concentric with the ring 15 dSena esthe outer edges of the rejecting en t e conductors 10 to hold t emfirmly against the sup ox-tingring 15. I The ring 16 may be divide atone or more points, and the abutting ends may be connected by bolts 17.This forms means for adjustin the circumference of the ring 16 to. moreor ess firmly pre'ss'the lprojecting ends oithe conductors 10 a. inst te ring 15. Hearing 16 may be forme ifdesired, with portions 18h havingslots 19 armed. in t em, throng which bolts may pass to secure the ringto the ends of projecj tions 21, formed for the purpose upon theclamping members. By this construction 16 ma be rigidly secured inplaeeinthe depen entl 0 its engagement with the projecting on s of theconductors. The portions 18 end projectioma 21may be dispensed withhowever, in many cases.

The lami'ine here all similar in construction,

tenons or devet ed projections 22 on its outer periphery which extendinto the underout groova 23, formed for the purpose in the member 7. Theouter side edge 22' of each tenon is radial. The inner edges of thetenonson each lamina are undercut however, at an angle of thirty degreesor thereabout-to the ad acent edge of the lamina proper. The outer endedge of each tenon is substantially concentric w: th the axis of themachine. I The side wslls'of the slot 23 areboth inclined at an angle offorty-five degrees to the face of the support 7 and theengaging edge ofthe sdjacent lamina. The distance between the tenons is so proportionedto the distances between the slots that when the tenons and slots areuntaposed a portion ofthe undercut tips 0 the tenons 22 overlaps the edes of the slots, as shown in Fig. 3. When t e tenon is forced into theslot, the overlap ing edge is turned up, as is clearly shown in igs. 4and 5. The laminae when assembled break joints with eachother in theusual manner. As a result overlapping tip portions of the'tenon 22 arealternately bent up at oppositesides of slots 23, as clearly ap ears in1g. 5, into the space between the ra ial edge of the tenon above it andthe side wall of the slot. As is clearly shown in Figs. 3 and 4, the"tenon is of a length somewhat-less than the depth of the slot 23. When,therefore, the tenons are forced into place, the outer edge ofeachlaminais firmly forced against the support 7. After each layer of laminae or anumber of layers of laminae have been assembled it is desirable tohammer the tenons in the slots firmly together, though with the thiniron ordinarily employed in the manufacture of armatures the laminae areso'flexible that the tenons may be easily forced in the slots by hand.Hammering the tenons into place still more firmly locks the laminaeagainst their support. The method of assembling laminae describedinsures a construction in which all of the laminae are rigidly locked totheir support, and this without the nice roportioning of parts which isnecessary wit other methods of assembling.

It will of course be understood that while particular degrees ofangularit specified for the tenon edges and the wal s of the slot workvery well in practice these angles may be varied without departing inany we from the spirit of my invention. It will be urther understoodthat my invention is not limited to use with laminae having tenons ontheir outer convex edges or with blage ma be employed in theconstruction of the revo ving element of a d amo-electric machine aswell as of the stationary element and in the field member as well as inthe armature member. M reover, the number of tenons on each lamina ma bevaried without departing from the spirit ofmy invention, and where eachlamina is provided with two or more'tenons some of the advantages of myinvention may be obtained where only part of.

the tenons are provided with portions overlappin the oove.

at claim as new, and desireto secure by Letters Patent of the UnitedStates, is

1. In a dynamo-electric machine, an annular core, conductors-projectingfrom said core, a casing surrounding said core, brackets formed on saidcasing, a ring supported by said brackets against which the projectinconductors rest, and a ring concentric wit aminac the edges of which arecurved. This method of assemand surrounding the first-mentioned ring andengagIing the. outer edges of said conductors. 2. n a dynamo-electricmachine, an annular core, conductors projecting from said core, a casingsurrounding said core, brackets formed on said casing, a ring supportedby said brackets against which the projecting conductors rest, a ringconcentric with an surrounding the first-mentioned ring engagmeans forvarying the circumference of said 3 In a dynamo-electric machine, anannular core, conductors projecting from said core, a casing surroundingsaid core, brackets formed on said casing, a ring supported by saidbrackets against which the projectin surrounding the first-mentionedring engaging the outer edges of said conductors, and means for rigidlysecuring said second ring to the core.

4. Incombination, a supportzformed with a plurality of undercut ooves,laminae. each formed with a pair 0 tenons which enter grooves in saidsupport, said tenons and said grooves bein of 'fferent shapes, andadjacent layers 0 laminae breaking joints whereby when the tenons areforced into the grooves portions of the tenons are bent and a space isleft between other portions of the tenons and the walls of the slot intowhich bent-up portions of the tenons of the lamin in an ad acent layerare received.

5. In a dynamo-electric machine, a laminated core, dovetail projectionson the laminations of said core, and a support formed withretaining-slots adapted to receive said projections, the edges of saidprojections hlaving a different slope from the sides of said s ots.

6. In combination, a support having undercut grooves formed in it, andlaminae secured to said support by tenons enterin said grooves, eachlamina being formed wit two tenons, portions of the side edges of whichare separated by a distance less than the distance between thecorresponding portions of the walls of the grooves in whic they enter.

7. In combination a support having undercut grooves formed in it, aminaesecured to the su port by tenons entering said coves, each of saidlaminae being formed wit a plurality of tenons, the tenons and groovesbeing so proportioned and shaped that when assembled a portion of 'oneatleast of the tenons will be distorted.

8. combination, a su ort having undercut ooves in it, an amines securedthereto y tenons entering said grooves, each of said lamina being formedwith two tenons, portions of'the side edges of which are separated bydistances different from the distances between corresponding portions ofthe side walls of the grooves.

ing the outer edges of said conductors, and

conductors rest, a ring concentric with an ternal armature comprising anouter annular.

supporting-frame and an inner annularcore, armature-conductors carriedby the core, the ends of said conductors projecting beyond the core, aradial stiiiening member connected to one end of said sup orting-frame,and means carried thereby f r supporting. the

projecting ends of the armature-conductors.

11. In combination, a support having grooves cut in it, the sides ofwhich are undercut at an an le of about forty-five degrees with the fapeo the support, and laminae secured to said support by tenons enteringsaid groove, one side of each tenon being undercut'at an angle of aboutthirty degrees with the face of the support.

12. In combination, a support havingundercutgrooves formed in it,laminae secured to said support by tenons entering said roove, one edgeof one tenon on each lamina being undercut, the angle between theundercut edge of the tenon and the body of the lamina being less thanthe angle between the wall of the slot and the face of the support, andthe parts being so roportioned and arranged that a portion 0? theundercnt side of the tenon is turned up by the wall of the slot inassembling the laminae on the support.

13. In a d name-electric machine, a laminated core, ovetail projectionson the laminations of said core, and a member siotted to receive saidprojections and adapted to support said core, the edges of saidprojections making a more acute angle with the adjacent edges ofthelarninations than the sides of the slots in said member make with theadjacent surface. of said member. 7 1

14. In a dynamo-electric machine, a laminated core, a-slotted member suporting said core, )rojecting dovetails on the aminations of sai coreengaging the slots in said member, said pro'ections having only one edges'lop ing, an adjacent projections in the same slot being arranged withtheir sloping edges facing inop osite directions. 15. In aynarno-electric machine, a laminated core, a slotted memb'er supportingsaid core, projecting dovetails on the laminations of said coreengaging'the slots in said member, said projections having only one edgesloping, and a portionof said projections hair-- in their 810 in ed esfacin in an o 'esite dii 'ection to the slo ping edg es of th btherrojections.

16. In a dynamo-electric machine, a laminated core, aslotted membersupporting said core, rejecting dovetails on the aminations df sai coreeng g the slots in said member, said projections having only one edgesioping, and a portion of said proj eetions having their sloping edgesfaeingin an opposite direction to the slo ing edges of the otherprojections, said 3 0 ing edges making a more acute angle wit the adacent edges of the laminations than the sides of the slots in saidmember make with the adjacent surface of said member.

In witness whereof I have hereunto set my hand this 6th day of Ma 1904.

a H NRY G; REIST. Witnesses:

Bnnmmn B. HULL, HELEN ORFORD.

